Didn't find it too bad-personally found the calculation one at the end the hardest. I got into a nasty habit at one point of working out the answer, typing it in and then running out of time so I couldn't hit submit! Ahhh well.
Cheers, should be good fun. Don't have a clue what they're going to ask so here's hoping.
Are you applying for the experienced positions or an ab-initio one??